These Edge Chevy Duramax Juice modules are completely weatherproof modules that easily install underneath the hood. In just 10 minutes, you can add four levels of adjustable power ranging from 40 to 90 hp, and increase torque by up to 250 ft.-lbs.! Unlike other products on the market, Juice modules allow for moving power to be put to the ground under all conditions without transmission slippage or "limp mode." These modules communicate along the engine's CAN-Bus data stream, from which they receive vital engine, transmission, and fuel system information. This enables the Juice modules to provide smooth and precise power curves that are truly custom, rather than just offset from stock.